The principle of the electric motor braking expander is to use the braking torque generated by the generator braking state of the motor to control the speed of the expander, if the braking motor fails, the expander speed will be out of control and it will overspeed. At this time, it is necessary to automatically open the protection control system, the method is that the speed measuring motor will send the overspeed signal, so that the three-way solenoid valve power off, the three-way solenoid valve directly controls the gas open pneumatic butterfly valve of the inlet of the expander, so that this butterfly valve quickly closed, the inlet air is cut off. At the same time, the valve stem rotates and touches the block and limit switch, so that the power supply to the expander motor is cut off to achieve safe parking.
DEAR company everything for the user, to provide customers with economic and reasonable project planning and programme design, project programme design plays a decisive role in the advanced and competitive ability of the product, is the core link of engineering construction, is an important part of the implementation of construction projects, is the key link in dealing with the relationship between technology and economics, is the key stage in controlling the cost of the project. Whether the technology used in the project is advanced and economically reasonable directly determines the reliability of the production of large air separation unit and operating costs. DEAR Air makes every effort to provide customers with perfect pre-sales services.
